David hallum



D. H-ALLUM.

MOLD' BEDFOR IGROGKERY WARE.

Patented Mar. 16, 1886.

19M 4696M INVENTOI? 6; vfia 6% WITNESSES A Home y N. FETEH5, Pholn-Umographer. Wilhinginn. 5-C- NITED STATES PATENT OFFICE.

DAVID HALLUM, OF EAST LIVERPOOL, OHIO, ASSIGNOR OF ONE-HALF TO 1 ROBERT HAILES.

MOLD-BED FOR CROCKERY-WARE.

:fllPEGlII-ICATION forming part of Letters Patent N0.338,226, dated March 16, 1886.

Application filed June 5, 1885. Serial No. 167,704. (Model) To all whom, it may concern.-

Be it known that I, DAVID HALLUM, a citizen of the United States, residing at East Liverpool, county of Oolumbiana, and State of 5 Ohio, have invented certain new and useful Improvements in Mold-Beds for Crockery- VVare; and I do hereby declare the following to be a description of the same, and of the manner of constructing and using the inven- LO tion in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it appertains to construct and use the same, reference being had to the accompanying drawings, forming a part of the specification, the principle of the invention being herein explained, and the best mode in which I have contemplated applying that principlc,so as to distinguish it from other inventions.

My invention is an improvement for the protection of molds used 'in the manufacture of crockery-ware, for the making of handles for the ware or other similar articles; and it consists,in brief,in attachment of durable facings of the mo1d-beds, as hereinafter more fully described.

Figurelis a plan view of the mold-bed having notches. Fig. 2 is avertical cross-section of the matching mold-bed on a line corre- 3 spending to line 00 a; of the preceding View. Fig. 3 is a detail vertical section of the two moldbeds on a line y y of Fig. 1.

A A are the half-mold beds matching each other in form and size, and made in the usual 5 manner and of materials in common use, so far as those portions of them are concerned that are distinct from the facings. On the working-surface of these beds,respectively,the mold a is formed.

B B are rim-facings made in size and shape to lit the mold-beds used, and they may be of any thickness and weight desired. Said facings are respectively let into peripheral recesses a", formed on the working-faces of the 5 half-beds A A, so that their outer surfaces are flush with said faces. The interior periphery of these facing-rims surround and inclose the outer edges of the mold, and so protect it. The working-surface of each facing is flush with the face-surface plane of each half-mold with which it is connected. Said facings are formed to reciprocate with each other in size and shape, so as to fit closely and tightly to each other as they are folded together.

For the purpose of protecting said moldbeds from lateral movement upon each other as they are folded together, they are furnished with reciprocating devices, knobs b I) being formed on facing B, and notches b b formed on the matching facing B, said knobs and notches locking in with each other. On facing 13 knob b is so located that its exterior side is flush with the exterior peripheral edge of the said facing. On facing B notch I) is so located that its exterior side portion opens flush with the exterior peripheral edge of said facing 13. The facings are attached to the other portions of the mold-beds while said portions are in a plastic state, and there fastened in any suitable manner or by any preferred means. After the facing is thus attached the mold is formed within its interior periphery. The said facings may be cast from iron or other metal,or they may be made of other material such as hard-burned clay,such as is commonly callec pitcherflor terracotta-at the option of the manufacturer.

Heretofore mold-beds of this class have been formed from one continuous mass of plaster or similar substance without additional indura- 8o ted facings. Thus they have been subject to some special disadvantages that arev obviated in my invention. For example,mold-beds composed simply of plaster or similar material are subject in frequent use to a rapid wearing 8 5 waste, so that the locking protection against lateral movement loses its original precision, thus exposing the casts to be less accurate and smooth in their outlines than they were at first.

In my invention the stern rigidity of the 0 matching facings is such that the wearing waste is very slight or scarcely perceptible, even in long use, so that the casts come out regular, smooth, and similar in their surfaces and outlines; also,the entire plaster molds commonly 5 in use are exposed to ready breakage by reason of the lack of such protection as my described faeings afford; and for this reason, as well as for the enduring quality of the facings described, my mold-beds, with their molds, will :00 far outlast in use such as not supplied with said facings, and so my mold-beds and their molds are in the event more economical pecuniarily than those destitute of such facings.

I estimate that molds protected by my improvement will make over two thousand dozen pieces of articles before they are worn much beyond profitable use.

I am aware that formerly molds have been provided with bands or rings encircling the entire peripheral surface of the molds; but my device difiers from thesein that the matching plates are located entirely within the exterior peripheral vertical line of the plaster molds, and are let into recesses formed on the working-faces of said molds,and also the looking devices on said plates are located entirely Within the peripheral plane of the said plaster molds.

What I therefore claim is The combination of two plaster molds,A A, each having its working-face provided with the peripheral marginal recess a and metallic Vi tnesses:

GEO. I. SKIRT, H. M. LARKINS. 

